Update tox template

Reviewed-by: Goncharov, Artem <artem.goncharov@t-systems.com>
Co-authored-by: gtema <artem.goncharov@gmail.com>
Co-committed-by: gtema <artem.goncharov@gmail.com>

otc_metadata/templates/conf.py.j2

@@ -104,6 +104,9 @@ html_title = "{{ title }}"
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ['_static']
 
+# Do not include sources into the rendered results
+html_copy_source = False
+
 # -- Options for PDF output --------------------------------------------------
 latex_documents = [
 {%- if pdf_name is defined %}